Chess Board
[ECO code A00]
SARAGOSSA OPENING
(The) Colle System
Black developed his king's knight, doubled his QP support and increased his control of White's K4(e4).
White develops his own King's Knight to KB3(f3), commands Q4+K5(d4+e5) and effectively transposes into a Colle System, Queen's Pawn Game.
	White	Black
 1.	P-QB3	P-Q4
 2.	P-Q4	Kt-KB3
 3.	Kt-KB3
Example ends: Undo or Jump or Clear